Lifting jack



"JULtiiZ, i923;

H. H. BURNS LIFTING JACK Filed Sent 28, 1921 2 Sheets-Sheet 1 m W p m ATTORNEY.

June 12, l 923.

H. H. BURNS LIFTING JACK ATTORNEY? Fatented June 112, i923.

earner clerics.

HENRY H. BURNS, OF BATTLE CREEK, MICHIGAN.

LIFTING JACK.

Application filed September 28, 1921. Serial No. 503,719.

T aZZ w hom it may concern Be it known that I, HENRY H. BURNs, citizen of the United States, residing at Battle Creek, county of Calhoun, State of Michigan, have invented a certain new and useful Improvement in Lifting Jacks, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference'being had to the accompanying drawings, which form a part of this specification.

My invention relates to lifting jacks and an object of my improvements is to provide a ack primarily for raising the axle of an automobile and having an improved construction and mode of operation.

I accomplish this object in the apparatus shown in the accompanying drawings, in which Figure l is a side elevation of a jack embodying my invention.

Fig. 2 is a section on the line IIII of Fig. l.

Fig. 3 is a detail section on the line IIIIII of Fig. 1.

Fig. 4 is a side elevation looking at the opposite side to that shown in Fig. 1, the up per end of the lifter rod being broken away and a part being broken away to more plainly show a detail of construction.

Fig. 5 is a section on the line ,VV, Fig. 1, the upper end of the lifter rod being broken away.

Fig. 6 is a section on the line VI-VI, Fig. 4, some of the parts being partly broken away.

Fig. 7 is a detail view partly in section supporting link.

a indicates the base or pedestal of the jack; this is made up of two supplementary stampings from sheet metal cm, ay. Each of these parts consists of a flat portion to rest upon the ground, having vertical flanges 64 and a with a half socket portion a be tween these flanges. The two parts are united by rivets a a passing through the flanges a and a The material of which i the pedestal is composed is cut and bent inward at a a (Fig. 5) to form lugs extending into the socket a. T

b is a length of channel iron of a shape showing a modified construction of the leverand cross-section corresponding to the interior of the socket a This is placed in said socket, its lower edge resting upon a flange a.

c is a strip of metal adapted to fit over and close the otherwise open portion between the side flanges of the channel iron 6, its lower edge resting upon a lug a opposite to that upon which the web of the channel iron rests. a is a rivet passing transverselythrough the walls of the socket a through the web of the channel iron 5 and through the lower end of the plate 0, thus firmly holding the channel iron and plate in position and assisting to bind the two halves of the base together.

(Z is a strip of band iron passing around the upper ends of the channel iron 7) and plate 0 and having its ends held together by the rivet 6Z upper ends of said'channel iron and plate firmly together in their. relative positions. The ends of the band 03 are turned outward parallel to each other and form a securing lug hereinafter referred to.

b is a slot formed through the web of the channel iron ?2 centrally thereof and c is a corresponding slot through the plate 0 opposite the slot 5 e is a lifter-rod, or plunger,fitting and adapted to reciprocate within the tubular construction formed by the channel iron d and plate 0. The lifter rod 6 is provided with a bracket f at its upper end having seats 7, f at different levels upon which the axle engages.

6 indicates apertures formed transversely through the bar 6 opposite the slots 6 and 0 g is a metal strip pivoted at one end to the lug extending from the strap iron d. g is a second. strip of metal also pivotedto the lug extending from the strip d and extending downward bending toward the. strap g and being secured thereto towards its outer end. The metal strip g at its outer end is bent outward and backward to form the hook 9 g is a rivet passing through the outer ends of the metal strips 9 and g and through the backwardly turned portion of the latter strip.

h is a dog or pawl pivoted at one end to the lug extending from the strip d and being provided with a guide piece it at its outer end. 1

The band cl serves to secure the form the pedal 9' 7' is a cylindrical,pin, e I l tending laterally arm 7' opposite to that .cfornae'diinto thepedal from the end of the lever 9' The pin 7' isof a size andshape to fit i within the ,apertures e forinedthrough the glitter rod 6. i jiiindicate's semicircular grooves v JfQlLHBCl in the loweredgeo'i the lever arm y :at suitable-position to engage--the intermer-idiate portion of: the rivet 9 as hereinafter V described. .1 jft is a notch cut in the upperedge 01 the; lever arm at the .-.proper position. rilais ailever pivoted at httothe side of the .jaleveriarin y'flandsada ated to oscillate-in the biplane otr-saidaarins 7 Q ;-ex'ten'ds l to a positionibelowe the slot-j .zotheroend extendstoaa. position adjacent the 5Qpedal j- .-1, 7st, indicatexpins upon the sidev I ovof; the lever arInj-adaptedito limit-the'oscillating movement of the lever arm y'." flhelever harm ,j; is .adjusteda'to position by. placing its 7 spin jtwithinv an; aperture 6 said pin extenduingrthrongh the 'slot a? \and by a lateral movex'mentscoming.withinrthe upturned portion g Y of: the. link .9, ainotch y' jengaging over the crrivetwg withinatheiu-pturned.portionfof said dink. Thezpawl. ordogrh now engages with i itsguide therpartuh iover theupper edge of the lever arm 1 in; such a :positiomthat when :theipedaliportion' y'fio-fithesaichlever arm is.

depressedyto?theglimit of its tnavel,. the lower BIidOfE.

40 jand hold said lever in/theelposition:to

'mWhich.itihastbeengadjusted. I

The lever arm jamayiberadjusted, to v posi-I tion by a llateral iandidownwardanotion wit11=..t,he formrof {suspension .nlinkwsholwn in -15,wthefirst'si 'figures of thedrawings, 3H a -,stronger gsuspendingzlink is required," "the form shown as a modificationinFig. 7-, may besusedyinwhich apiece-.1016 strap iron 9 is .7 substituted; for the iron g and-(forms with athe ,stripwg anxangular loop into which the leveraarnli i'j must be 1- inserted by; an endwise ,AI iFlOIL v ."Theoperation of; the above-described idevicejs as follows: j 'y-The ack "is; placed under the I aXle to the lifted and the lifter bar esisiraisediuntil the .r v..axle'=engages upon a seat F" or 7. EThe lever iarm'j; is thenplacedinto the position with its pim j aengaging'through an aperture 6 e0joneiofgtheflslots "j? engaging the pin g? in the stirrup g g and the pedal iy' rbeingin an elevated position. The 1 pawl/h now rests Mupon the smooth upper; edge of 713116 1 lever .larm j. =The operator placesrhis foot upon the pedal j and presses it downward, thus arm rectangular-in cross=sec-l guard piece k? quits-the pedal y lifter bar 6 to descend andloweringithesaxle.

. '1. Inlanapparatus ofjthe kind deseribed, neend ofthe lever k-ithe'combination ofzthexsupportingguide. b,

the i he dog he-shall engage in the notch.

;,presseddown to one limit ot'i,its;-t-ravel, the

degor pawl h engages in the notch h and holds the lever arm j in its adjusted position,

thus,automatically,fastening thelifting bar in its position with theaxle raised. When it ,is desired to lower the axle-the operator again places his foot upon the pedal i and turnsiit to pressidown'ward on the adjacent end ofthe lever 70. This oscillates the lever is about its pivot Ze -causing. the other end of saiddever tolengage apart :of the and pressrthe dog it outrof engagement with =i3he..:SlOl j gages the lever arm 'y'gand the operator. per- 3 ,to raise .thus allowing the NVhat Iclainris:

a band, d engaging aroundntheiuppersend of said guidesiand -iprovided \withnanvout- .wardly extending lug a link 9; pivoted to said lug .:and depending therefrom,; a lifting bariadaptjed to recipr cateiin-isaid guide, 7 a lever j :pivotally supportedcuponisaid link and engaging said liftingban to actuate-the same,- said lever-being providedwitha notch atits upper end, a' pawl -h.,:pivotled:toisaid lug at one end and at'the other endires'ting .uponsaid lever so as toengage inisaidi notch.

vofwthe kind described,

the apertures .lIl'aSSJlCl tion, a said. lever 1 being adaptedi to pivetally :engage said; swinging a link aby the. .i a

lateralninovement.

'8. In an apparatus of the/kind. described,

, a" verticalg-uidezb, ailiftingebari adapted to I reciprocate J in said -guide,-said guide :being so constructed as to leave one sidehofesaid reciprocating bar exposed, vaperturesqeXtendingvinto SLld ba-rxfrom the GXPOSB'dEeSldG thereof, a swinging link-:pivotedato :sa'id guide v.atlxone end and providedlwith a pin toward the-i other I end, 1 a clever lj-ihaving a laterally extending pin j iadaptedito engage in.- said; apertures, saidv lever L-being adapted to pivotally engage :the .c'pin on: saidzdink when in'positionto cause the. pin y? to engage I o in one of :sa1dapertures.

4;. In anapparatus of theikindi described, a vertical. guide as liftingaharaadapted to reciprocate in .said guide, said :guide being so constructed as to leave one ;si'de of,the reciprocating bar exp.osed,. aperturesiextending into said bar :from the exposed side from the exposed side thereot, a. Lswinging link pivoted rat: one send ito said '.guide ,1 and. a. lever adapted to; actuate said "bar, .said I leveribeing ia-dapte'd to engage in b ar-ibyra 1ateralu1n0 thereof, a lever having a lateral extending pin 1' adapted to engage in said apertures by a lateral movement, a fulcrum supported by said guide, said lever being adapted to engage said fulcrum when in position to cause the pin 7' to engage in one of said apertures.

5. In an apparatus of the kind described, a vertical guide I), a lifting bar adapted to reciprocate in said guide, said guide being so constructed as to leave one side of said reciprocating bar exposed, apertures extending into said bar from the exposed side thereof, a lever j having a laterally extending pin 7' adapted to engage in said apertures by a lateral movement, a fulcrum supported by said guide, said lever being adapted to engage said fulcrum and said fulcrum being adapted to permit the movement of said lever to engage and disengage said pin.

6. In an apparatus of the kind described, the combination of a lifting bar and a channel iron, said lifting bar engaging Within said channel iron and reciprocating therein, a plate extending between the outer edges of the side flanges of said channel bar and secured in place to retain said bar in position, and a sheet iron base having the lugs a turned inward from thematerial thereof, said base binding said plate and channel iron together and said lugs supporting said channel iron and plate.

In testimony whereof, I sign this specification.

HENRY H. BURNS. 

